stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
UT Physics Ch. 15 Edelman Flashcards | StudBud
Explore
/
UT Physics Ch. 15 Edelman
UT Physics Ch. 15 Edelman
66 terms
·
StudBud Administration
·
6 plays
Imported from external platform
Flashcards
66 cards
F
Practice quiz
P
Host live
L
Questions
66
Answers
1
Which one is an analog number?
101.00
101.101
101
2
Preprocessing = TGC , log compression, write magnify, edge enhancement
False
True
3
“Writing”
Digitizing analog numbers
Storage of image information
Display of image information
4
Contrast determines range of brilliancies
True
False
5
PACS stands for
Picture analysis computer sonography
Picture archive communication system
Picture archive computer systems
Picture analysis communication system
6
Coded excitation does not improve contrast resolution
False
True
7
High pixel density has
Small pixels, more pixels, high details
Small pixels, few pixels, high details
Large pixels, few pixels, high details
8
Low pixel density has
Small pixels, more pixels, high spatial res.
Small pixels, few pixels, low spatial res.
Large pixel, fewer pixels, low spatial res.
Large pixels, more pixels, high spatial res.
9
How many shades of gray are in 3 bits?
12 shades
16 shades
4 shades
8 shades
10
What is the difference between spatial and temporal compounding?
Temporal has better spatial resolution
Temporal - high frequency, spatial-low frequency
Spatial- multiple views, temporal - one view
Spatial- 2 views temporal - frequency
11
All processing before storage are called
Preprocessing
Post processing
Digital-Analog
Translating
12
Which is not a characteristic of read zoom?
Unchanged spatial resolution
Original is discarded
Unchanged pixel number
ROI is not rescanned
13
Fill in interpolation reduces spatial resolution
False
True
14
Format in this conversion may be altered
Postprocessing
Preprocessing
Write magnification
Translating
15
Spatial compounding uses
One real time image from history images
One real time image combined with other angles
Edge enhancement and contrast brightness
16
Digital numbers are
Continuous, unlimited, real world
Obsolete, limited, computer world
17
“Detailed resolution”
Spatial resolution
contrast resolution
Temporal resolution
18
Brightness determines the brilliance
True
False
19
Any change after freeze time is applicable to
Postprocessing
Preprocessing
20
The theory of elastography states
Tissue deform without force
Tissue deform alike when force is applied
Tissue deform differently when force is applied
Tissue deform based on the transducers PZT strength
21
All processing after storage is called
Preprocessing
Processing
Postprocessing
Translating
22
A byte has
8 decimals
8 bits
8 numbers
8 words
23
Spatial compounding works by
Increasing frame rates and history
Using space time
Using different angles and frames
Increases artifacts
24
All are qualities of write zoom except
ROI is rescanned
Pixels are of identical size as original
Better spatial resolution
Original is archived
25
You may transfer data between PACS without DICOM
True
False
26
Electrical signals from the transducer are converted from
Pro processing
Digital to analog
Post processing
Analog to Digital
27
Elastography uses ________ properties of tissue
Chemical
Elastic
Mechanical
Physical
28
“Read”
Display of image information
Storage of image information
Digitizing analog numbers
29
Video monitors have display controls of
Color and Doppler
Sector size and frame rate
Analog and digital
Contrast and brightness
30
PACS works by
Storing images into private laboratories
Storing images into one large network
Storing images into private medical facilities
31
Fill-in interpolation fills in between
Noise cancellation
Scan lines
Field of view
Missing frames
32
What type of number is 0-9?
Word
Decimal
Binary
Digital
33
Which one is an advantage to digital scan converters?
Instability
Deterioration
Image fade
Accuracy
34
Real world numbers
Analog
Digital
35
More bits have more shades of gray and
Lower contrast resolution
Better contrast resolution
Identical contrast resolution
36
Which one is a binary number?
1010010
101/11
37
Which one is a digital number?
101.001
101.01
101.00
38
Which one is not an advantage of PACS?
Access to archived studies
Store-forward telemedicine
No degradation of data
Cannot send to remote sites
39
Picture elements per inch
Bits
Pixel density
Pixel
40
Bistable means
2, black and white
4, shades of gray
3, color
41
Picture element, building block of digital image
Portrait
Pixel density
Pixel
Picture
42
Post processing = black white/conversion, read zoom, contrast variation, 3D rendering
True
False
43
Read magnification is preprocessing
True
False
44
Frequency compounding works by
Using sub-bands of different frequencies
Using different angle views
Uses history frames and angles
45
All conversions in this processing is final
Black/white conversion
Preprocessing
Translating
Postprocessing
46
PACS is the system and DICOM are the set of rules
True
False
47
When using flat panels, ________ converter is not needed
Preprocessing
Postprocessing
D-A converter
A-D converter
48
Which is not a quality of read zoom?
ROI is zoomed in
Improved spatial resolution
Unchanged spatial resolution
Unchanged pixels
49
A word has
8 bits
16 bits
12 bits
16 bytes
50
Frequency compounding works by
Using sub-bands from one reflection
Using different angles and frames
Contrasting edges of boundaries
51
A bit is composed of
Zeroes only
1-9
0, 1
0-9
52
DICOM means
Digital imaging computers in medicine
Digital imaging computational magnets
Digital imaging communications in medicine
Digital imaging correlation to medicine
53
What are the components to a digital scan converter?
Black, white
Gray shades
Color, gray
Pixel, bit
54
Which one is the limitation of analog scan converters?
Speed
Durability
Image flicker
Uniformity
55
Coded excitation provides improved spatial resolution, temp resolution, deep penetration
True
False
56
Temporal compounding works by
Uses same principles as spatial compounding
Using history images superimposed into one image
Multiple angles frames and their history frames
57
Which one is not an advantage to digital scan converters?
Accuracy
Uniformity
Speed
Image flicker
58
Analog numbers have....
Continuous values, unlimited choices, real world
Obsolete value, limited, computer world
59
Elastography uses the _______ data of a tissue
Instability
Stiffness
Medium
Durability
60
Which one is not an analog scan converter limitation?
Image fade
Deterioration
Image flicker
Durability
61
Fill-In interpolation increases
Line density
Multi focus
Bandwidth
Sector size
62
High contrast images have
Low contrast resolution
High contrast resolution
63
Coded excitation uses long pulses with wide range frequencies
False
True
64
How many shades of gray are in 5 bits?
16
10
32
25
65
Multiple shades of gray images have
High contrast resolution
Low contrast resolution
66
Gray scale means
Contrasted shades of gray for better detail
Multiple shades of gray, better tissue detail
2-4 shades of gray
